1 /*
   2  * Copyright (c) 1999, 2019, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_CI_CIARRAY_HPP
  26 #define SHARE_CI_CIARRAY_HPP
  27 
  28 #include "ci/ciArrayKlass.hpp"
  29 #include "ci/ciConstant.hpp"
  30 #include "ci/ciObject.hpp"
  31 #include "oops/arrayOop.hpp"
  32 #include "oops/objArrayOop.hpp"
  33 #include "oops/typeArrayOop.hpp"
  34 #include "oops/valueArrayOop.hpp"
  35 
  36 // ciArray
  37 //
  38 // This class represents an arrayOop in the HotSpot virtual
  39 // machine.
  40 class ciArray : public ciObject {
  41 private:
  42   int _length;
  43 
  44 protected:
  45   ciArray(    arrayHandle h_a) : ciObject(h_a), _length(h_a()->length()) {}
  46   ciArray( objArrayHandle h_a) : ciObject(h_a), _length(h_a()->length()) {}
  47   ciArray(typeArrayHandle h_a) : ciObject(h_a), _length(h_a()->length()) {}
  48   ciArray(valueArrayHandle h_a): ciObject(h_a), _length(h_a()->length()) {}
  49 
  50   ciArray(ciKlass* klass, int len) : ciObject(klass), _length(len) {}
  51 
  52   arrayOop get_arrayOop() const { return (arrayOop)get_oop(); }
  53 
  54   const char* type_string() { return "ciArray"; }
  55 
  56   void print_impl(outputStream* st);
  57 
  58   ciConstant element_value_impl(BasicType elembt, arrayOop ary, int index);
  59 
  60 public:
  61   int length() { return _length; }
  62 
  63   // Convenience routines.
  64   ciArrayKlass* array_type()         { return klass()->as_array_klass(); }
  65   ciType*       element_type()       { return array_type()->element_type(); }
  66   BasicType     element_basic_type() { return element_type()->basic_type(); }
  67 
  68   // Current value of an element.
  69   // Returns T_ILLEGAL if there is no element at the given index.
  70   ciConstant element_value(int index);
  71 
  72   // Current value of an element at the specified offset.
  73   // Returns T_ILLEGAL if there is no element at the given offset.
  74   ciConstant element_value_by_offset(intptr_t element_offset);
  75 
  76   // What kind of ciObject is this?
  77   bool is_array()        { return true; }
  78 };
  79 
  80 #endif // SHARE_CI_CIARRAY_HPP